Mechatronics Technology is a growing career field that deals with the integration of mechanical and electronic components managed by control systems. Mechatronics technicians troubleshoot, maintain and repair mechanical equipment controlled by electrical, electronic and computer systems. These types of systems are increasingly used in a wide variety of manufacturing and industrial settings. Clark College's Mechatronics Technology (MTX) classes emphasize current concepts and technology by providing practical, hands-on experiences with the latest, industry standard equipment. In addition to the technical knowhow needed to maintain and repair equipment, the certificate and degree programs will help prepare students to think critically, function as a successful team member and communicate clearly too internal and external customers.

Mechatronics기술개발 현황과 과제

Proceedings of the International MultiConference of Engineers and Computer Scientists, Vol II, IMECS 2009

Actively simulated grounded inductors have been used in several applications ranging from filter to oscillator design as well as cancellation of parasitic inductances. In this paper, new grounded inductance simulators employing only one voltage differencing current conveyor (VDCC) and two passive components are proposed. Two new topologies for realizing positive and negative lossless inductances and four different topologies for realizing lossy inductances are proposed. The aim of this paper is to present new inductance simulators using the minimum number of active and passive components. The proposed inductance simulators can be tuned electronically by changing the biasing current of the VDCC. Moreover, the circuits do not require any conditions of component matching. Finally, using one of the proposed inductance simulators a third-order high-pass filter is constructed. The performance of the proposed filter is verified and simulated by using SPICE.

Positive/negative lossy/lossless grounded inductance simulators employing single VDCC and only two passive elements

In this paper, we propose a new R/D (Resolver-to -Digital) conversion method, in which a bang-bang type phase comparator is employed for fast tracking. We eliminate from the R/D conversion loop the low-pass filter which is needed to reject carrier signal and noise. Instead, we employ two prefilters outside the R/D conversion loop that take the role of the low-pass filter. Thereby, we can construct a fast and accurate tracking R/D converter. Some simulation and experimental results as well as mathematical performance analysis are presented to demonstrate the superior tracking performance of our R/D converter over conventional tracking R/D converters.

A Resolver-to-Digital Conversion Method for Fast Tracking

This paper presents some interesting new applications in the field of analog signal processing focused on signal generation. A novel modifications of recently developed and studied family of active elements, called voltage differencing buffered amplifier (VDBA) and voltage differencing inverted buffered amplifier (VDIBA) are discussed. Our attention is focused on simple application of active elements like dual output VDBAs (DO-VDBAs) and fully balanced VDBAs (FB-VDBAs), where one or two z terminals and always voltage outputs of both polarities are present. The last modification of VDBA allows additional electronic control of voltage gain in frame of active element except standard transconductance control. Discussed active elements were used to build very simple multiphase oscillators with minimal complexity as a simple non-tunable alternative to classical conceptions utilizing lossy integrators in phase-shifted loop. Linearly tunable quadrature differential mode (balanced) oscillator or balanced simple triangle and square wave generator were chosen as other useful examples. Features of proposed circuits are discussed and selected examples verified and evaluated by computer simulations with appropriate low-voltage TSMC 0.18 m CMOS technology models.

Voltage Differencing Buffered/Inverted Amplifiers and Their Applications for Signal Generation

A simple configuration to realize the floating resistance converters using operational transconductance amplifiers (OTAs) is introduced in this paper. Negative and positive resistances driven by both the voltage and current signals can be achieved in the same scheme. The magnitude of the resulting resistances can be electronically controlled by varying the bias current ratio of OTAs. In addition, the capacitance conversion can be also provided without stability problem. Experimental results verifying the performances of the proposed converters are presented.

Floating current-controlled resistance converters using OTAs

This paper presents the Pulse Induction Metal Detector Using Sample and Hold Method. The proposed method is to measure output voltage from search coil. The system consists of the pulse generator circuit, amplifier circuit, integrator circuit, three mono-stable circuits, sample and hold circuit, comparator circuit and display circuit. The voltage output signal of the proposed technique is proportional to size, shape and type of metal target. The metal target with differential size was used in our experiment as an illustrative case study. Experimental results show that the proposed method can detect metal with satisfied sensitivity and good linearity.

Pulse Induction Metal Detector Using Sample and Hold Method

A technique for extending the linear range of a linear variable differential transformer (LVDT) is introduced in this paper. The linear operating range of a commercial LVDT is narrow compared to the full stroke range due to its nonlinear transfer characteristic. The narrow linear range of the commercial LVDT can be extended to maximum stroke range using the proposed technique based on LVDT inverse transfer characteristic. The circuit building block provided the third-order inverse transfer characteristic of the LVDT is established using analog multipliers and operational amplifiers (opamps). The proposed technique requires only commercially available devices, which is attractive in terms of a simple configuration and low cost. Performances of the proposed technique are discussed in detail and confirmed by simulation and experimental results using the commercial LVDT. As a result, the linear range of the LVDT used in this paper can be extended from ±2mm to ±15mm with the maximum absolute error of about $10.23{\mu }\text{m}$ or the full-scale error of about 0.068%. It is shown that the linear range of LVDT can be extended greater than seven times.

Simple Technique for Linear-Range Extension of Linear Variable Differential Transformer

A simple circuit technique to realise a floating inductance simulator for system response compensation is presented in this paper The circuit implementation is based on the use of the operational transconductance amplifiers (OTAs) as active elements The proposed circuit converts a grounded capacitance into a floating inductance with electronically variable properties The proposed inductor is attractive in terms of simple configuration and low cost Experimental results verifying the performances of the proposed circuit are also included

http://ieeexplore.ieee.org/iel5/5305883/5332438/05334339.pdf

OTA-based floating inductance simulator

A simple interface circuit for single resistive sensor-based remote measurements is presented. The realization method using commercially available devices provides not only the output signal linearly related to resistive sensor changes but also the compensation of effect due to lead-wire resistances. Performance of the proposed circuit is confirmed through experimental results.

http://ieeexplore.ieee.org/iel5/6375948/6393028/06393388.pdf

Wandee Petchmaneelumka

Papers

Floating current-controlled resistance converters using OTAs

Pulse Induction Metal Detector Using Sample and Hold Method

Simple Technique for Linear-Range Extension of Linear Variable Differential Transformer

OTA-based floating inductance simulator

Simple interface circuit with lead-wire-resistance compensation for single resistive sensors